APA (7th ed.) Citation

Darnay, E. B., & Leighton, H. M. (1989). Directory of Special Libraries and Information Centers 1989 (12. ed.). Gale Research Inc.

Chicago Style (17th ed.) Citation

Darnay, Ed. Brigitte, and Holly M. Leighton. Directory of Special Libraries and Information Centers 1989. 12. ed. Detroit: Gale Research Inc, 1989.

MLA (9th ed.) Citation

Darnay, Ed. Brigitte, and Holly M. Leighton. Directory of Special Libraries and Information Centers 1989. 12. ed. Gale Research Inc, 1989.